Question 1

What is the definition of electric current?

Accepted Answer

The flow of charged particles, typically electrons, in a circuit.

Answer

The rate of energy transfer in a circuit.

Answer

The opposition to the flow of charge in a circuit.

Answer

The flow of protons in a circuit.

Question 2

What is the unit of measurement for electric current?

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Coulomb (C)

Question 3

What instrument is used to measure electric current in a circuit?

Accepted Answer

Ammeter

Answer

Ohmmeter

Answer

Voltmeter

Answer

Multimeter

Question 4

How is current distributed in a series circuit?

Accepted Answer

The current is the same throughout the circuit.

Answer

The current varies depending on the resistance of each component.

Answer

The current splits evenly between all components.

Answer

The current is highest at the beginning of the circuit.

Question 5

How does current behave in a parallel circuit?

Accepted Answer

The current splits between the branches, and the total current leaving the cell is the sum of the currents in each branch.

Answer

The current remains constant throughout all branches.

Answer

The current is zero in the branch with the highest resistance.

Answer

The current is highest in the branch with the lowest resistance.

Question 6

If a circuit has a current of 2 A, how much charge flows past a point in 5 seconds?

Accepted Answer

10 C

Answer

7 C

Answer

0.4 C

Answer

2.5 C

Question 7

What is the direction of conventional current flow?

Accepted Answer

From positive to negative.

Answer

From negative to positive.

Answer

It depends on the type of circuit.

Answer

It is random.

Question 8

Why is conventional current flow opposite to the actual flow of electrons?

Accepted Answer

Both a and b.

Answer

It simplifies circuit analysis.

Answer

It is a historical convention based on an incomplete understanding of electricity.

Answer

It is more intuitive.

Question 9

If the current in a circuit is 0.5 A and the time is 10 seconds, what is the charge flow?

Accepted Answer

5 C

Answer

0.05 C

Answer

50 C

Answer

20 C

Question 10

What is the relationship between current and the number of electrons flowing per second?

Accepted Answer

Directly proportional: more current means more electrons.

Answer

It depends on the material the current is flowing through.

Answer

There is no relationship.

Answer

Inversely proportional: more current means fewer electrons.

Question 11

What is another term for potential difference?

Accepted Answer

Voltage

Answer

Current

Answer

Power

Answer

Resistance

Question 12

What is the definition of potential difference?

Accepted Answer

The amount of electrical energy transferred per unit charge passing between two points in a circuit.

Answer

The rate of flow of charge in a circuit.

Answer

The opposition to the flow of current.

Answer

The total amount of energy in a circuit.

Question 13

What does a potential difference of 1 Volt (V) signify in terms of energy transfer?

Accepted Answer

1 Joule of energy is transferred for each Coulomb of charge that moves through the circuit.

Answer

1 Joule of energy is lost for every Ampere of current.

Answer

1 Ohm of resistance is encountered.

Answer

1 Watt of power is consumed.

Question 14

How is potential difference distributed in a series circuit?

Accepted Answer

It is shared between the components.

Answer

It is the same across all components.

Answer

It depends on the power source.

Answer

It is highest at the beginning of the circuit.

Question 15

How does potential difference behave in a parallel circuit?

Accepted Answer

It is the same across each branch.

Answer

It varies depending on the resistance of each branch.

Answer

It is shared between the branches.

Answer

It decreases as more branches are added.

Question 16

What is a battery?

Accepted Answer

Two or more cells connected together.

Answer

A component that stores electrical energy.

Answer

A single cell that converts chemical energy to electrical energy.

Answer

A device that measures potential difference.

Question 17

How do you calculate the total potential difference of a battery with cells connected in the same direction?

Accepted Answer

You add the potential differences of the individual cells.

Answer

You take the average of the individual cell potential differences.

Answer

You subtract the potential difference of one cell from the total potential difference.

Answer

You multiply the potential difference of one cell by the number of cells.

Question 18

What happens to the potential difference of a battery when cells are connected in opposite directions?

Accepted Answer

The potential differences cancel each other out.

Answer

The potential difference remains the same.

Answer

The potential difference doubles.

Answer

It depends on the type of cells used.

Question 19

Which instrument is used to measure potential difference?

Accepted Answer

Voltmeter

Answer

Ohmmeter

Answer

Multimeter

Answer

Ammeter

Question 20

If a component has a potential difference of 12V across it and a current of 2A flowing through it, what is the energy transferred in 5 seconds?

Accepted Answer

120 J

Answer

24 J

Answer

6 J

Answer

30 J

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